Pacifist opens up .pkg installer packages, .dmg disk images, .zip, .tar. tar.gz, .tar.bz2, .pax, and .xar archives and more, and lets you extract or install individual files out of them. This is useful if you need to install just one file out of a package instead of the entire package (for example, if you deleted your Preview application and need to reinstall it, but not the whole operating system), or if you want to inspect a downloaded package to see what it will do before installing it
Pacifist can also load some archive types over HTTP, in case you want to extract just a single file from a large .zip archive without waiting for the entire archive to download. Finally, Pacifist can examine the kernel extensions installed in your system to let you see what installer installed them, and whether the installer was made by Apple or a third-party.

WHAT'S NEW Version 3.2.5:Fixed an issue that caused incomplete text to appear in the “Quick Start” windowFixed an issue that could cause the splash screen to display incorrectly on machines with Intel Iris graphics (hopefully permanently this time)Various internal architectural improvementsVarious bug fixes